Electric apparatus serving as a dynamo or motor and as an engine starter



Oct. 4,1927, 1,644,065

L. LANQUETIN ELECTRIC APPARATUS SERVING AS A DYNAMO OR MOTO ND AS AN ENG STARTER ed July 16, 'l 5 Imm?? Iln combustion engines ture will suddenly stop,

Patented Oct, 4, 1927.

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LON 'LANQUETIN,

0F rams, FRANCE, -AssIGNoa nccnnnrnaor PAR-1s, manca y 1,644,065 PATENTA oifi=1c1=;v.' y

fro SOCITV ETABLrssnM-Enrs nnnc'rmc APrAnA'rUssEnvING .as A nYNAMe on :coronaria as AN mwa-N15 i s'rAR'rERW" appunaon inea my 1e, 1925, sei-ini No) .The present invention relates to yan electric apparatus serving asl-a starter for internat, :and also asa dynamo for producing current during the normal opera-y tion, in which Vthe armature-shaft is con-V nected with the engine shaft'by means of a. planetary gear set "Whereofthe gear carrier; is coupled to one of the shafts and the toothed ring maybe axially displaced, for coupling it either with the said gear holder or with the stationary Casing of the apparatus. Y

Known apparatus of kthis class is in use in which the toothed ring is provided on its lateralr faces with ratchet teeth engaging either with corresponding teeth on one side `of the planetary gear carrier or with teeth upon one side of the casing. f

In an apparatus of this kind, should a back-fire of the engine take place during, the starting period, the toothed ring will be held upon the said casing and the armature Will be driven at an increased speed. At this time, should the motor suddenly stop, the reactions on the said ring will be changed in direction so that the ring will be connected with the ,planetary gear holder andthe armatlius producing` shocks which might damage the teeth.'

lTo obviate this drawback, I employ according to my invention suitable devices which permit the increase in the speedrof the armature, but prevent all shocks when the engine suddenlyrstops'after the back-fire.

Such devices, which I will hereinafter des-V ignate as effort-limiting. devices, mayv be placed at anydesired point in theapparatus. TheyVV are inoperative when the starter is functioning, and may slip when the engine drives the apparatus in the direction corresponding to the functioning'as a dynamo and when the load coupleexceeds the couple required toL drive the dynamo, which. will take place in the event of back fire of the engine.

The appended drawing shows by Way of.: example one embodiment ofthe invention.

The figure is a longitudinal section of the changespeed box of the apparatus, which is provided with an effort limiting device..

l is lthe shaft ofthe starter, 2a shaft adapted to be coupled to the shaft of the engine, 3 the planetary gear holder which is vthe engine, lteeth 7 with 44,116, and lin Francey November A5 1924.v

vmounted on the, shaftQ, the planetary pinionsr engaging av wornii Wheel 4a. which is formed on thefshaft l, and with the axially vmovable .toothed ring `5.

Asis -Well known 1n such devices, 'the ring I5 `(carrying 4the :clutch teeth .6 and 7 von its respec :ive faces) when subjected to the reactions due to .the teeth of the lspiral gear,`

will come to a stop during the starting of due to the engagement ofits stationary bearing 9 Which is secured to .the end ofthe casing of the apparatus.

When the apparatus ceases to act asl a` starter and now actsas a generator, the reacthe like teeth 8 mounted on the Y tions Whose direction is reversed will have i the effect of displacing the said toothed ring in the contrary direction to the preceding,-

and its teeth 6 will engage thelike teeth 10.

In theknown apparatus, these teeth l() form part ,of the planetary gear holder 3 and are hence secured to the engine shaft; but in the device herein represented they are mountedon a disk 1-1 which is rotatable y c y relatively tothe planetary gear carrier; said disk is centered on the shaft 2 and is coulpledito the planetary gear carrier by the friction studs 13, urged by the springs l2;

Y the pressure of said springs is so calculated that the friction will insure the functioning ofthe apparatus as a generator, but will allow the disk 11 to `rotate on the shaft' -2 should av back-fire occur in the engine, thus `producing a shock.

- obviously, the invention in noty innnnd to the forms of construction hereinbefore set forth by Way of example, and I 'may employ all desired vforms of effort-limiting devices other than Whatpare herein represented.

Inlike manner, the effort-li1niting device Y i may be disposed at other points on theapparatus, and for instance I may place it upon the shaft of the armature between the latter and the pinionfi which formspart of said shaft in the embodiment shown.`

Imay further, Without 4departing from the spirit of theinvention, dispose any surt-v ableeffort-limiting device upon anV apparatus vserving asa starter and as a generator'v which may be of a diiferent type than the one to Which the said device is applied by way Vof example.

Having thus described my process and provided with an internal helicoidal toothapparatus, what I claim as new therein, and own invention, isf- In an electric apparatus serving as a starter for an internal combustion engine as Well as a dynamo driven by the said engine during the normal operation of the latter, the combination of the armature shaft of the electric apparatuswvith a main shaft adapted to be coupled to the said engine, the said shafts being disposed on a common axis, a spiral gear on the said armature shaft, a planetary pinion carrier on the vsaid main shaft, planetary pinions With helicoidal teeth mounted on the planetary pinion carrier and adapted to engage the said spiral gear, an axially movable ring ing and adapted to continually engage the said planetary pinions, a plate adapted to said ring in order to stop the latter When Y displaced in the contrary,` direction, andv slip coupling means for connecting together the said plate and the said planetary pinion carrier, the said means comprising spring studs upon one of the saidV plate and" planetary pinion carrier, adapted to engage and eventually to slip upon the other of these t-Wo parts.

fixed my signature. v p

i LEON LANQUETIN.

. s 35V In testimony whereof I have hereunto af 

